Confirmation of the Structures of Lutein and Zeaxanthin
作者:Anthony Linden、Bruno Bürgi、Conrad Hans Eugster
DOI:10.1002/hlca.200490115
日期:2004.5
A series of new esters of lutein (1a) have been prepared with the aim of confirming the structure of lutein via an X-ray crystal-structure analysis. Although well crystallized, only one of the derivatives, the (−)-(1R)-menthyl carbonate (1i) proved to be useful for a complete structure analysis. The same derivative of zeaxanthin (2a) also allowed its crystal structure to be determined. Both analyses